Specifications

4000326 Rev A Receivers 2-13
Troubleshoot Alarm Conditions,
Continued
Troubleshooting Power Supply Alarms
The following table shows the possible causes of power supply alarms and their
solutions.
Note: Some or all of the steps will cause a service interruption.
Alarm Status Possible Causes Possible Solutions
Loose, unplugged, or
damaged power
cords.
Check the power supply
power cord and connections.
A blown fuse on the
power supply.
Check the power supply fuse.
Repair or replace as needed.
A faulty power
supply module.
Verify proper power supply
module operation. Repair or
replace as needed.
The receiver is not
seated properly in the
chassis.
Verify that the receiver is
securely connected to the
chassis.
Damage to the
chassis or module
backplane connector.
Verify that there is no visible
damage to the connector.
• +5 V DC Analog
Power
• +5 V DC
Digital Power
• -5 V DC
Digital Power
• +15 V DC
Digital Power
• +24 V DC
Digital Power
High or Low
• A faulty receiver
module.
• No AC at
receptacle
Are any other units in this
chassis having the same
problem?
• If no, the receiver may be
faulty and should be
replaced.
• If yes, the chassis may
have a problem.
For help, telephone the
Scientific-Atlanta assistance
center in your area.
Continued on next page